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Home >> Volkswagen >> 2005 >> Jetta TDI, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) >> 01 On Board Diagnostic (OBD) >> Measured value blocks >> Evaluating Measured value blocks, at idle >> Evaluation: Start of injection (specified) display

Evaluation: Start of injection (specified) display

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VAG1551 display Possible cause of malfunction Corrective action
Earlier than 3 ° BTDC
  • Engine too cold
  • Run engine at increased speed to warm up and repeat check.
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